mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
354 lines
10 KiB
C
354 lines
10 KiB
C
![]() |
/*
|
||
|
* Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved.
|
||
|
*
|
||
|
* This program is free software; you can redistribute it and/or modify it
|
||
|
* under the terms of version 2 of the GNU General Public License as
|
||
|
* published by the Free Software Foundation.
|
||
|
*
|
||
|
* This program is distributed in the hope that it would be useful, but
|
||
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||
|
*
|
||
|
* Further, this software is distributed without any warranty that it is
|
||
|
* free of the rightful claim of any third person regarding infringement
|
||
|
* or the like. Any license provided herein, whether implied or
|
||
|
* otherwise, applies only to this software file. Patent licenses, if
|
||
|
* any, provided herein do not apply to combinations of this program with
|
||
|
* other software, or any other product whatsoever.
|
||
|
*
|
||
|
* You should have received a copy of the GNU General Public License along
|
||
|
* with this program; if not, write the Free Software Foundation, Inc., 59
|
||
|
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
|
||
|
*
|
||
|
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
|
||
|
* Mountain View, CA 94043, or:
|
||
|
*
|
||
|
* http://www.sgi.com
|
||
|
*
|
||
|
* For further information regarding this notice, see:
|
||
|
*
|
||
|
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
|
||
|
*/
|
||
|
#ifndef __XFS_DIR2_LEAF_H__
|
||
|
#define __XFS_DIR2_LEAF_H__
|
||
|
|
||
|
/*
|
||
|
* Directory version 2, leaf block structures.
|
||
|
*/
|
||
|
|
||
|
struct uio;
|
||
|
struct xfs_dabuf;
|
||
|
struct xfs_da_args;
|
||
|
struct xfs_inode;
|
||
|
struct xfs_mount;
|
||
|
struct xfs_trans;
|
||
|
|
||
|
/*
|
||
|
* Constants.
|
||
|
*/
|
||
|
|
||
|
/*
|
||
|
* Offset of the leaf/node space. First block in this space
|
||
|
* is the btree root.
|
||
|
*/
|
||
|
#define XFS_DIR2_LEAF_SPACE 1
|
||
|
#define XFS_DIR2_LEAF_OFFSET (XFS_DIR2_LEAF_SPACE * XFS_DIR2_SPACE_SIZE)
|
||
|
#define XFS_DIR2_LEAF_FIRSTDB(mp) \
|
||
|
XFS_DIR2_BYTE_TO_DB(mp, XFS_DIR2_LEAF_OFFSET)
|
||
|
|
||
|
/*
|
||
|
* Types.
|
||
|
*/
|
||
|
|
||
|
/*
|
||
|
* Offset in data space of a data entry.
|
||
|
*/
|
||
|
typedef __uint32_t xfs_dir2_dataptr_t;
|
||
|
#define XFS_DIR2_MAX_DATAPTR ((xfs_dir2_dataptr_t)0xffffffff)
|
||
|
#define XFS_DIR2_NULL_DATAPTR ((xfs_dir2_dataptr_t)0)
|
||
|
|
||
|
/*
|
||
|
* Structures.
|
||
|
*/
|
||
|
|
||
|
/*
|
||
|
* Leaf block header.
|
||
|
*/
|
||
|
typedef struct xfs_dir2_leaf_hdr {
|
||
|
xfs_da_blkinfo_t info; /* header for da routines */
|
||
|
__uint16_t count; /* count of entries */
|
||
|
__uint16_t stale; /* count of stale entries */
|
||
|
} xfs_dir2_leaf_hdr_t;
|
||
|
|
||
|
/*
|
||
|
* Leaf block entry.
|
||
|
*/
|
||
|
typedef struct xfs_dir2_leaf_entry {
|
||
|
xfs_dahash_t hashval; /* hash value of name */
|
||
|
xfs_dir2_dataptr_t address; /* address of data entry */
|
||
|
} xfs_dir2_leaf_entry_t;
|
||
|
|
||
|
/*
|
||
|
* Leaf block tail.
|
||
|
*/
|
||
|
typedef struct xfs_dir2_leaf_tail {
|
||
|
__uint32_t bestcount;
|
||
|
} xfs_dir2_leaf_tail_t;
|
||
|
|
||
|
/*
|
||
|
* Leaf block.
|
||
|
* bests and tail are at the end of the block for single-leaf only
|
||
|
* (magic = XFS_DIR2_LEAF1_MAGIC not XFS_DIR2_LEAFN_MAGIC).
|
||
|
*/
|
||
|
typedef struct xfs_dir2_leaf {
|
||
|
xfs_dir2_leaf_hdr_t hdr; /* leaf header */
|
||
|
xfs_dir2_leaf_entry_t ents[1]; /* entries */
|
||
|
/* ... */
|
||
|
xfs_dir2_data_off_t bests[1]; /* best free counts */
|
||
|
xfs_dir2_leaf_tail_t tail; /* leaf tail */
|
||
|
} xfs_dir2_leaf_t;
|
||
|
|
||
|
/*
|
||
|
* Macros.
|
||
|
* The DB blocks are logical directory block numbers, not filesystem blocks.
|
||
|
*/
|
||
|
|
||
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_MAX_LEAF_ENTS)
|
||
|
int
|
||
|
xfs_dir2_max_leaf_ents(struct xfs_mount *mp);
|
||
|
#define XFS_DIR2_MAX_LEAF_ENTS(mp) \
|
||
|
xfs_dir2_max_leaf_ents(mp)
|
||
|
#else
|
||
|
#define XFS_DIR2_MAX_LEAF_ENTS(mp) \
|
||
|
((int)(((mp)->m_dirblksize - (uint)sizeof(xfs_dir2_leaf_hdr_t)) / \
|
||
|
(uint)sizeof(xfs_dir2_leaf_entry_t)))
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Get address of the bestcount field in the single-leaf block.
|
||
|
*/
|
||
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_LEAF_TAIL_P)
|
||
|
xfs_dir2_leaf_tail_t *
|
||
|
xfs_dir2_leaf_tail_p(struct xfs_mount *mp, xfs_dir2_leaf_t *lp);
|
||
|
#define XFS_DIR2_LEAF_TAIL_P(mp,lp) \
|
||
|
xfs_dir2_leaf_tail_p(mp, lp)
|
||
|
#else
|
||
|
#define XFS_DIR2_LEAF_TAIL_P(mp,lp) \
|
||
|
((xfs_dir2_leaf_tail_t *)\
|
||
|
((char *)(lp) + (mp)->m_dirblksize - \
|
||
|
(uint)sizeof(xfs_dir2_leaf_tail_t)))
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Get address of the bests array in the single-leaf block.
|
||
|
*/
|
||
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_LEAF_BESTS_P)
|
||
|
xfs_dir2_data_off_t *
|
||
|
xfs_dir2_leaf_bests_p(xfs_dir2_leaf_tail_t *ltp);
|
||
|
#define XFS_DIR2_LEAF_BESTS_P(ltp) xfs_dir2_leaf_bests_p(ltp)
|
||
|
#else
|
||
|
#define XFS_DIR2_LEAF_BESTS_P(ltp) \
|
||
|
((xfs_dir2_data_off_t *)(ltp) - INT_GET((ltp)->bestcount, ARCH_CONVERT))
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Convert dataptr to byte in file space
|
||
|
*/
|
||
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DATAPTR_TO_BYTE)
|
||
|
xfs_dir2_off_t
|
||
|
xfs_dir2_dataptr_to_byte(struct xfs_mount *mp, xfs_dir2_dataptr_t dp);
|
||
|
#define XFS_DIR2_DATAPTR_TO_BYTE(mp,dp) xfs_dir2_dataptr_to_byte(mp, dp)
|
||
|
#else
|
||
|
#define XFS_DIR2_DATAPTR_TO_BYTE(mp,dp) \
|
||
|
((xfs_dir2_off_t)(dp) << XFS_DIR2_DATA_ALIGN_LOG)
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Convert byte in file space to dataptr. It had better be aligned.
|
||
|
*/
|
||
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BYTE_TO_DATAPTR)
|
||
|
xfs_dir2_dataptr_t
|
||
|
xfs_dir2_byte_to_dataptr(struct xfs_mount *mp, xfs_dir2_off_t by);
|
||
|
#define XFS_DIR2_BYTE_TO_DATAPTR(mp,by) xfs_dir2_byte_to_dataptr(mp,by)
|
||
|
#else
|
||
|
#define XFS_DIR2_BYTE_TO_DATAPTR(mp,by) \
|
||
|
((xfs_dir2_dataptr_t)((by) >> XFS_DIR2_DATA_ALIGN_LOG))
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Convert dataptr to a block number
|
||
|
*/
|
||
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DATAPTR_TO_DB)
|
||
|
xfs_dir2_db_t
|
||
|
xfs_dir2_dataptr_to_db(struct xfs_mount *mp, xfs_dir2_dataptr_t dp);
|
||
|
#define XFS_DIR2_DATAPTR_TO_DB(mp,dp) xfs_dir2_dataptr_to_db(mp, dp)
|
||
|
#else
|
||
|
#define XFS_DIR2_DATAPTR_TO_DB(mp,dp) \
|
||
|
XFS_DIR2_BYTE_TO_DB(mp, XFS_DIR2_DATAPTR_TO_BYTE(mp, dp))
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Convert dataptr to a byte offset in a block
|
||
|
*/
|
||
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DATAPTR_TO_OFF)
|
||
|
xfs_dir2_data_aoff_t
|
||
|
xfs_dir2_dataptr_to_off(struct xfs_mount *mp, xfs_dir2_dataptr_t dp);
|
||
|
#define XFS_DIR2_DATAPTR_TO_OFF(mp,dp) xfs_dir2_dataptr_to_off(mp, dp)
|
||
|
#else
|
||
|
#define XFS_DIR2_DATAPTR_TO_OFF(mp,dp) \
|
||
|
XFS_DIR2_BYTE_TO_OFF(mp, XFS_DIR2_DATAPTR_TO_BYTE(mp, dp))
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Convert block and offset to byte in space
|
||
|
*/
|
||
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DB_OFF_TO_BYTE)
|
||
|
xfs_dir2_off_t
|
||
|
xfs_dir2_db_off_to_byte(struct xfs_mount *mp, xfs_dir2_db_t db,
|
||
|
xfs_dir2_data_aoff_t o);
|
||
|
#define XFS_DIR2_DB_OFF_TO_BYTE(mp,db,o) \
|
||
|
xfs_dir2_db_off_to_byte(mp, db, o)
|
||
|
#else
|
||
|
#define XFS_DIR2_DB_OFF_TO_BYTE(mp,db,o) \
|
||
|
(((xfs_dir2_off_t)(db) << \
|
||
|
((mp)->m_sb.sb_blocklog + (mp)->m_sb.sb_dirblklog)) + (o))
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Convert byte in space to (DB) block
|
||
|
*/
|
||
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BYTE_TO_DB)
|
||
|
xfs_dir2_db_t xfs_dir2_byte_to_db(struct xfs_mount *mp, xfs_dir2_off_t by);
|
||
|
#define XFS_DIR2_BYTE_TO_DB(mp,by) xfs_dir2_byte_to_db(mp, by)
|
||
|
#else
|
||
|
#define XFS_DIR2_BYTE_TO_DB(mp,by) \
|
||
|
((xfs_dir2_db_t)((by) >> \
|
||
|
((mp)->m_sb.sb_blocklog + (mp)->m_sb.sb_dirblklog)))
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Convert byte in space to (DA) block
|
||
|
*/
|
||
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BYTE_TO_DA)
|
||
|
xfs_dablk_t xfs_dir2_byte_to_da(struct xfs_mount *mp, xfs_dir2_off_t by);
|
||
|
#define XFS_DIR2_BYTE_TO_DA(mp,by) xfs_dir2_byte_to_da(mp, by)
|
||
|
#else
|
||
|
#define XFS_DIR2_BYTE_TO_DA(mp,by) \
|
||
|
XFS_DIR2_DB_TO_DA(mp, XFS_DIR2_BYTE_TO_DB(mp, by))
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Convert byte in space to offset in a block
|
||
|
*/
|
||
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BYTE_TO_OFF)
|
||
|
xfs_dir2_data_aoff_t
|
||
|
xfs_dir2_byte_to_off(struct xfs_mount *mp, xfs_dir2_off_t by);
|
||
|
#define XFS_DIR2_BYTE_TO_OFF(mp,by) xfs_dir2_byte_to_off(mp, by)
|
||
|
#else
|
||
|
#define XFS_DIR2_BYTE_TO_OFF(mp,by) \
|
||
|
((xfs_dir2_data_aoff_t)((by) & \
|
||
|
((1 << ((mp)->m_sb.sb_blocklog + \
|
||
|
(mp)->m_sb.sb_dirblklog)) - 1)))
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Convert block and offset to dataptr
|
||
|
*/
|
||
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DB_OFF_TO_DATAPTR)
|
||
|
xfs_dir2_dataptr_t
|
||
|
xfs_dir2_db_off_to_dataptr(struct xfs_mount *mp, xfs_dir2_db_t db,
|
||
|
xfs_dir2_data_aoff_t o);
|
||
|
#define XFS_DIR2_DB_OFF_TO_DATAPTR(mp,db,o) \
|
||
|
xfs_dir2_db_off_to_dataptr(mp, db, o)
|
||
|
#else
|
||
|
#define XFS_DIR2_DB_OFF_TO_DATAPTR(mp,db,o) \
|
||
|
XFS_DIR2_BYTE_TO_DATAPTR(mp, XFS_DIR2_DB_OFF_TO_BYTE(mp, db, o))
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Convert block (DB) to block (dablk)
|
||
|
*/
|
||
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DB_TO_DA)
|
||
|
xfs_dablk_t xfs_dir2_db_to_da(struct xfs_mount *mp, xfs_dir2_db_t db);
|
||
|
#define XFS_DIR2_DB_TO_DA(mp,db) xfs_dir2_db_to_da(mp, db)
|
||
|
#else
|
||
|
#define XFS_DIR2_DB_TO_DA(mp,db) \
|
||
|
((xfs_dablk_t)((db) << (mp)->m_sb.sb_dirblklog))
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Convert block (dablk) to block (DB)
|
||
|
*/
|
||
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DA_TO_DB)
|
||
|
xfs_dir2_db_t xfs_dir2_da_to_db(struct xfs_mount *mp, xfs_dablk_t da);
|
||
|
#define XFS_DIR2_DA_TO_DB(mp,da) xfs_dir2_da_to_db(mp, da)
|
||
|
#else
|
||
|
#define XFS_DIR2_DA_TO_DB(mp,da) \
|
||
|
((xfs_dir2_db_t)((da) >> (mp)->m_sb.sb_dirblklog))
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Convert block (dablk) to byte offset in space
|
||
|
*/
|
||
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DA_TO_BYTE)
|
||
|
xfs_dir2_off_t xfs_dir2_da_to_byte(struct xfs_mount *mp, xfs_dablk_t da);
|
||
|
#define XFS_DIR2_DA_TO_BYTE(mp,da) xfs_dir2_da_to_byte(mp, da)
|
||
|
#else
|
||
|
#define XFS_DIR2_DA_TO_BYTE(mp,da) \
|
||
|
XFS_DIR2_DB_OFF_TO_BYTE(mp, XFS_DIR2_DA_TO_DB(mp, da), 0)
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Function declarations.
|
||
|
*/
|
||
|
|
||
|
extern int
|
||
|
xfs_dir2_block_to_leaf(struct xfs_da_args *args, struct xfs_dabuf *dbp);
|
||
|
|
||
|
extern int
|
||
|
xfs_dir2_leaf_addname(struct xfs_da_args *args);
|
||
|
|
||
|
extern void
|
||
|
xfs_dir2_leaf_compact(struct xfs_da_args *args, struct xfs_dabuf *bp);
|
||
|
|
||
|
extern void
|
||
|
xfs_dir2_leaf_compact_x1(struct xfs_dabuf *bp, int *indexp,
|
||
|
int *lowstalep, int *highstalep, int *lowlogp,
|
||
|
int *highlogp);
|
||
|
|
||
|
extern int
|
||
|
xfs_dir2_leaf_getdents(struct xfs_trans *tp, struct xfs_inode *dp,
|
||
|
struct uio *uio, int *eofp, struct xfs_dirent *dbp,
|
||
|
xfs_dir2_put_t put);
|
||
|
|
||
|
extern int
|
||
|
xfs_dir2_leaf_init(struct xfs_da_args *args, xfs_dir2_db_t bno,
|
||
|
struct xfs_dabuf **bpp, int magic);
|
||
|
|
||
|
extern void
|
||
|
xfs_dir2_leaf_log_ents(struct xfs_trans *tp, struct xfs_dabuf *bp,
|
||
|
int first, int last);
|
||
|
|
||
|
extern void
|
||
|
xfs_dir2_leaf_log_header(struct xfs_trans *tp, struct xfs_dabuf *bp);
|
||
|
|
||
|
extern int
|
||
|
xfs_dir2_leaf_lookup(struct xfs_da_args *args);
|
||
|
|
||
|
extern int
|
||
|
xfs_dir2_leaf_removename(struct xfs_da_args *args);
|
||
|
|
||
|
extern int
|
||
|
xfs_dir2_leaf_replace(struct xfs_da_args *args);
|
||
|
|
||
|
extern int
|
||
|
xfs_dir2_leaf_search_hash(struct xfs_da_args *args,
|
||
|
struct xfs_dabuf *lbp);
|
||
|
extern int
|
||
|
xfs_dir2_leaf_trim_data(struct xfs_da_args *args, struct xfs_dabuf *lbp, xfs_dir2_db_t db);
|
||
|
|
||
|
extern int
|
||
|
xfs_dir2_node_to_leaf(struct xfs_da_state *state);
|
||
|
|
||
|
#endif /* __XFS_DIR2_LEAF_H__ */
|